TB/T 3452-2016 in English
VALIDTechnical specification for welding of stainless steel used on EMU/DMU
- Issued on:2016-09-30
- Implemented on:2017-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$350.00
| Standard No: | TB/T 3452-2016 |
| Document status: | VALID |
| Title in English: | Technical specification for welding of stainless steel used on EMU/DMU |
| Title in Chinese: | 动车组用不锈钢焊接技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-09-30 |
| Implemented on: | 2017-04-01 |
| ICS Classification: | 45.060.01-Railway rolling stock in general |
| Chinese Classification: | S30-General rolling stock standards in general |
| Professional Classification: | TB-Railway Transport |
| Related Keywords: | resistance spot welding
stud welding minimum welding spot arc welding welding materials |
| Related Topics: | tb/t 1961-2016
EMU stainless steelweldingcryogenic tb/t3441-2016 tb/t3367-2016 tb/t2993.5-2016 Welding Technology Welding Technology tb/t3440-2016 iso stainless steel welding rod stainless steel welding Specifications for welding rods for steel containment tb/t 3466-2016 tb/t 3432-2016 |
本标准规定了动车组用不锈钢焊接的基本要求、电阻点焊、气体保护电弧焊、螺柱焊的技术要求。本标准适用于动车组不锈钢车辆及其零部件的焊接,其他轨道车辆可参照执行。
Introduction
Analysis of the core content of the standard
This standard specifies three key technologies for welding stainless steel for EMUs:
- Resistance spot welding: The minimum welding spot spacing specification is shown in Appendix A
- Gas shielded arc welding: The welding materials must comply with ISO 14343
- Stud welding: The process assessment is carried out in accordance with ISO 14555
Comparison of key technologies
| Process type | Assessment standard | Key parameters | Test method |
|---|---|---|---|
| Resistance spot welding | ISO 15614-12 | Nugget diameter ≥ 5mm (1mm plate thickness) | ISO 14273 shear test |
| Gas shielded welding | GB/T 19869.1 | Interpass temperature ≤ 150℃ | ISO 17637 visual inspection |
| Stud welding | ISO 14555 | Bending angle ≥ 30° (capacitive) | Macro section inspection |
Implementation points
Typical application cases
When resistance spot welding the side wall panels of a certain type of EMU, CrCu electrodes were used with pure argon protection, and the distance between welds was controlled at 35mm (1.5mm plate thickness). The ISO 14270 peel test verified that the weld strength was increased by 15%.
Analysis of Standard Evolution
Compared with the old version of the standard, the 2016 version has the following major updates:
- Added stud welding process qualification requirements (Appendix E)
- Refine the interlayer temperature control indicators of gas shielded welding
- Clarify the allowable number of resistance spot welding repairs (≤2 times)
Quality Control Recommendations
- Establish a welding process qualification database (WPQR)
- Simplified work specimen verification is required before starting work every day
- Use special stainless steel tools for post-weld cleaning
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